Definition of Unsteadiness

Unsteadiness: Loss of one's equilibrium in regard to
the environment, often with a feeling of almost falling, or the
result of bumping into things.

There are many causes for
unsteadiness, including problems in the cerebral or cerebellar
portions of the brain, the spinal cord, vestibular system, or inner
ear. Unsteadiness is medically distinct from dizziness,
lightheadedness, and vertigo.